Corner coupler



FIG. 1 is a top perspective view of a corner key coupler in accordance with one embodiment of the invention;

FIG. 2 is a bottom perspective view of the corner key coupler of FIG. 1;

FIG. 3 is a front view of the corner key coupler of FIG. 1;

FIG. 4 is a rear or back view of the corner key coupler of FIG. 1;

FIG. 5 is a right side view of the corner key coupler of FIG. 1;

FIG. 6 is a left side view of the corner key coupler of FIG. 1;

FIG. 7 is a top view of the corner key coupler of FIG. 1; and,

FIG. 8 is a bottom view of the corner key coupler of FIG. 1. 

CLAIM The ornamental design for a corner coupler, as shown and described. 